Irrigation pump



May 14, 1929. H. EARL IRRIGATION PUMP Filed Oct. 21, 1927 2 Sheets-Sheetl IIHIHI- May 14, 1929. H. EARL IRRIGATION PUMP Filed Oct. 21, 1927 2Sheets-Sheet f f/omer-f g WITNESS: w 2

Patented May 14, 1929.

PATENT, OFFICE- .HoMEn EARL, or HASTINGS, NEBRASkA. j

IRRIGATION PUMP.

Application filed October 21, 1927. Serial No. 827,792.

-My present invention has reference to a centrifugal irrigation pump andmy ob ect is the provision of a pump of this type and for this purposethat shall comprise few simple parts and which will successfullydischarge water in a large volume with a comparatively small expenditureof motive ower.

A further and important object is to construct a pump of this type inwhich the eas- 7 ing performs the dual purpose of a curb and dischargepipe, the said casing having a lower perforated'portion which is sunkbelow the water line and having its top portion provided with wateroutlets and a cap dis posed over the said top portion through which isjournaled the shaft of an impeller of a particular, peculiar and noveldesign, there being adjustably arranged in the casing a notched ringthat provides a support for the saddle for the impeller and the suctionpipe being connected to and communieating with the lower end of thesaddle and with the blades of the impeller.

Afurther object is the provision of a device for this purpose in whichan impeller and a saddle therefor constitutes the pump, b'oththe saddleand the impeller being inserted in the discharge pipe which alsoconstitutes thecurb for the well, and in which the employmentof a voluteand extra discharge pipe and frame for holding the same is entirelydispensed with, and further in which asingle thrust hearing at the topof'the well provides a support for the shaft of the impeller.

The improvement also resides in other novel features of construction,combination and operative association of parts, one satisfactoryembodiment of which is disclosed by the accompanying drawings.

In the drawings: V

Figure 1 is an elevation, with parts broken away and parts in section ofmy improvement.

Figure 2 is a sectional view approximately on the line 22 of Figure 1.

Figure 3 is a perspective view of the support for the saddle.

The casing 1 of the improvement is made up of any desired number ofsections, all of the said sections being of the same diameter The lowerend of the casing is provided with annular series of apertures 2.Thisportion of the casing is arranged below the water line so that theapertures provide water inlets to the casing. The casing, it is to benoted provides the discharge pipe for the well. The casing '1, above theground level has circumferentially arranged spaced series of openings 3therethrough and these openings afl'ord water outlets. The top of thecasing is closed by a flanged cap member 4, the said cap at the centerthereof being provided with a round opening that is surrounded byoppositely extending flanges 5, the said flanges in reality affordingthe top or cap 4 with a hub through which is journaled the shaft 6 forthe impeller. The shaft 6 has fixed on its outer end a wheel 7 for abelt or for other means for rotating the shaft. The wheel 7 may restdirectly upon the outer end of the hub 5, or there may be suitableanti-frictional bearings (not shown) between the said hub and wheel.Thehub it will be noted serves as a thrust bearing for the wheel.

Before the cap is arranged in position and before the shaft 6 isjournaled through the hub of the cap, I arrange in the casing 1 a ringmember 8. Thisrin member may be secured adjusted in the casing by anydesired means. The ring 8 has its upper edge provided with spacednotches 9, and these notches are designed to receive therein offsetfingers or lugs 10 that project from the upper edge of the saddle'll ofthe improvement. The saddlehas its body portion substantially cupshapedand its bottom formed with an opening that is surrounded by a tubularextension 12. On the bottom of the saddle, the said extension 12 has athickened portion at its outer end that affords an inner shoulder 13.The thickened portion of the annular flange or pipe member is interiorlythreaded and has screwed therein the'upper end of the suction pipe 14. VV

Splined as well as fixed on the shaft 7 through the medium of anadjustable element 15 there is the upper and sleeve end 16 of theimpeller 17. The impeller is hollow and is of substantially pear-shapeformation. The

rounded bottom of the impeller provides inner and outer spaced walls 18and 19 respectively, the inner wall having a central openingtherethrough surrounded by an inwardly directed flange 20 that receivestherein the lower end of the fixed shaft 6. Betweenthe inner and outerrounded walls 18 and 19 of the impeller 17 there are curved blades 21.By reference toFigure 1 of the drawings it will be noted that the walls18 and 19 that provide the water ducts for the blades 21 are graduallyspa'ced away from each other from their upper to their lower portions sothat the greater volume of water from the suction pipe 14 will enter thelower and widened pas sage between the walls 18 and 19 and after beingacted upon by the curved blades 21 will end is disposed directly overthe shoulder 13 of the saddle. The annular extension 23 is provided onits outer face with spaced continuous grooves 24 and these groovesafford a water cushion or a water lubricant between the impeller and thesaddle. There is no undue frictional engagement between the impeller andthesaddle, as the wheel 7 for the shaft 6, resting-upon the thrustbearing provided by the hub 5 hold the said impeller and saddle in onlyslight contacting engagement which will in no way interfere with thefree turning of the impeller.

My improvement employs less parts and is of a simpler nature than thecentrifugal pumps for the same purpose. The advantages of'myconstruction will, it is thought, be readily apparent to those skilledin the art to which such invention relates so that further detaileddescription is not thought necessary. Obviously I do not wish to berestricted to the precise details of my improvement as herein set forthand, therefore, hold myself entitled to such changes therefrom as fairlyfall within the scope of what I claim.

Having described the invention, I claim:

1. A centrifugal irrigation pump comprising a casing having an aperturedlower portion designed to be sunk below water level and having wateroutlets adjacent to its top, and said casing comprising a flow pipe, animpeller mounted to revolve in the casing, a

saddle in which the lower end of the impelleris snugly received forrotation, andthe upper portion of the saddle having outstanding lugs, aring member removably and adjustably secured in the casing and havingnotches to receive the lugs of the saddle therein, a

V suction pipe connected to and depending from the lower portion of thesaddle and entering the apertured portion of the casing, said suctionpipe being in a line with the blades of the impeller. w

2. A centrifugal irrigation pump comprising a casing having an aperturedlower portion designed to be sunk below water level and having wateroutlets adjacent to its top, a

flanged cap closing .the top of the casing and having a central hubportion, a shaft journaled through the hub and entering the casing, awheel fixed on the outer end of the shaft, and resting on the hub, animpeller removably and adjustably fixed on the shaft, said impellercomprising a substantially pearshaped hollow member and having itsrounded bottom comprising inner and outer spaced walls, and curvedblades connecting the walls, a substantially cup-shaped saddle in whichthe outer wall of the impeller is snugly and freely received forrotation, a removable and adjustable support in the casing for thesaddle and a suction pipe secured to the lower end of the saddle andarranged in a line with the blades of the impeller. r

3. A centrifugal irrigation pump comprising a casing having an aperturedlower portion designed to be sunk below water level and having wateroutlets adjacent to its top, a flanged cap closing the top of the casingand having a central hub portion, a shaft journaled through the hub andentering the easing, a wheel fixed on the outer end of the shaft andbearing on the hub, an'impeller removably and adjustably fixed on theshaft, said impeller comprising a substantially pear-shaped hollowmember and having its rounded bottom comprising innerfand outer spacedwalls, and curved blades connecting the walls, the outer wall having adepending annular portion provided with outer continuous grooves, acup-shaped saddle freely and snugly receiving the outer and lower wallof the impeller therein, a removable and adjustable support in thecasing for the saddle, said saddle having its lower end formed with anannular extension provided with an inwardly directed shoulder which isdisposed adjacent the end of the extension on the impeller, and asuction pipe screwed in the said extension of the saddle.

In testimony whereof I aflix my signature.

HOMER EARL.

